Portable Impact Wrench Anti-Vibration and Ventilation Design
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Solution Overview
Problem
Existing portable impact wrenches used in railway construction and maintenance are physically demanding, produce significant noise and vibrations, and are prone to mechanical and electrical damage due to exposure to harsh environmental conditions.
Innovation Solution
The development of a portable impact wrench with an anti-vibration system and a ventilation system that separates the motor compartment from the electronic control system, using a metal radiator as a heat sink to prevent dust and moisture from entering the electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced ventilation is used to cool the motor, then the motor overheating is prevented, but dust and humidity are sucked into the housing damaging electrical components
Solution Approach 1:
The housing is divided into a motor compartment and an electronic components compartment, separated by a partition wall. This segmentation allows the motor to be ventilated independently while protecting the electrical components from dust and humidity ingress through the ventilation system.
2Adaptability or versatility
If the wrench is used in harsh environmental conditions (humidity, dust, water sprays), then the versatility and adaptability improve, but the mechanical and electrical parts deteriorate faster
Solution Approach 1:
A ventilation system with filters and a partition wall act as intermediaries between the harsh external environment and the internal electrical components. These intermediaries allow necessary air flow for cooling while blocking harmful dust and humidity particles from reaching sensitive electrical parts.
3Object-affected harmful factors
If mechanical vibrations from the percussion mechanism and motor are reduced, then the harmful effects on operator and components decrease, but the complexity of the vibration isolation system increases
Solution Approach 1:
Vibration isolation elements are introduced as intermediaries between the vibration-generating components (motor, percussion mechanism) and the housing. These elements absorb and dampen vibrations, reducing harmful effects on the operator and internal components while adding minimal structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The anti-vibration system reduces operator exposure to harmful vibrations, while the ventilation system protects the electrical components from dust and moisture, enhancing the wrench's durability and usability in challenging environments.
Implementation Method 1
using a metal radiator as a heat sink to prevent dust and moisture from entering the electrical components
Implementation Method 2
The anti-vibration system reduces operator exposure to harmful vibrations
Data Source
AI summary
An impact wrench includes a motor unit with a motor adapted to produce a rotary motion and an operating switch for operating the motor. A tool-holder shaft rotatable about a rotation axis. A transmission unit with a percussion mechanism, connects between the motor unit and the tool-holder shaft. A handlebar structure has two manual gripping handles. An electronic control system contains at least one electronic control board connected to one or more electric batteries and to the operating switch. A damping connection system mechanically connects a transmission housing of the transmission unit to a main housing of the motor unit and the main housing to the handlebar structure. The damping connection system includes: one or more first damper elements interposed between the transmission housing and the main housing, and one or more second damper elements interposed between the main housing and the handlebar structure.